Lori over at Words on a Page has proclaimed today her first annual awareness day so that writers will demand what they are worth. Look, even if you think "I'm just starting out" or "I don't have the experience to demand $XX/hour," by undervaluing yourself and your talents, you are undervaluing writers everywhere. So don't do it.
Instead of wasting time on some half-baked article for $10/apiece, you could be working on a novel, writing a kick-ass query to break into a bigger publication, or spending time with your family. Isn't your time worth more than that?